Sonic Mole Chaser Is Completely Safe For Pets And Children And Can Be Very Effective In Driving Moles Away. I love this thing. I need to put new batteries in mine. We have been told it works better in clay soil than in sandy soil and works better in moist soil. You put batteries in this metal tube then push it deep in the ground and it beep-beep-beeps underground and drives the moles nuts so they leave. You need one for the front yard and back yard as the house will block the sound. I love this thing. Try it at your house.